Siphon pump



April 23, 1940. H, L T 2,198,401

SIPHON PUMP Filed May 18, 1939 Inventor A liomeys Patented Apr. 23, 1940 PATENT OFFICE SIPHON PUMP Hugh 0. Allston, Charleston, S. 0., assignor of one-eighth to James W. Jennings, Charleston,

Application May 18, 1939, Serial No. 274,447

2 Claims.

My invention relates to improvements in siphon pumps for use in cleaning out liquid, sludge, or the like, from pits, tanks, or other places where the use of a gravity drain is not possible.

The invention is designed with the particular purpose in view of providing a quick-acting siphon pump for use with steam, or water, under pressure, which is adapted for greater capacity output in proportion to its size than siphon pumps of commerce, and which will not become clogged andis inexpensive to manufacture and service.

To the accomplishment of the above, and subordinate objects presently appearing, a preferred embodiment of my invention has been illustrated in the accompanying drawing, set forth in detail in the succeeding description, and defined in the claims appended hereto.

In said drawing:

Figure 1 is a View in vertical longitudinal section of a siphon pump embodying my im provements, V

Figure 2 is a view in side elevation of the auxiliary pressure inlet nozzle,

Figure 3 is a similar view of the main pressure inlet nozzle, and c Figure 4 is a view in rear end elevation of the main pressure inlet nozzle.

Referring to the drawing by numerals, in the illustrated embodiment thereof, the pump of my invention comprises a pair of suction and discharge pipes l and 2 of the same diameter coupled together, in preferably right-angle relation by means of an elbow-like fitting 3. The discharge pipe 2 is preferably shorter than the suction pipe I. The fitting 3 is provided with an external rear boss 4 having an internally threaded bore therein in axial alignment with the discharge pipe 2 in which is threaded the front end of a tubular main pressure inlet nozzle 5 of uniform diameter and somewhat smaller in diameter than that of the pipes i and 2, said nozzle being axially alignedwith the discharge pipe 2. The outer end of the main pressure inlet nozzle 5 is externally threaded, as at 5, for the attachment thereto of a steam, or water, pressure line not shown. Within the main pressure inlet nozzle 5 is a tubular auxiliary pressure inlet nozzle 1 preferably of the same length as that of the nozzle 5 but smaller in diameter and mounted in said nozzle 5 in concentric spaced relation thereto to provide an air chamber 8 between said nozzles opening into the rear of the fitting 3. The mounting for the auxiliary nozzle 1 comprises a pair of short arcuate spacers 9 at the rear end of said nozzles 5, I, welded thereto at diametrically opposite sides thereof to provide arcuate inlet ports I therebetween, the welding not being shown. The 'front end of the auxiliary nozzle 1 is restricted internally to provide a short diametrical outlet port I l of reduced diameter in said nozzle. The outer end of said nozzle is notched at diametrically opposite sides thereof as at l2 to facilitate attachment to the pressure line. The front end of the auxiliary nozzle 1 has an external flange 1' around the same restricting the discharge end of chamber 8.

Referring now to the operation, the suction pipe I, as will be obvious, is inserted in the tank, pit, or sump, as the case may be, in upright position and steam, or water, under pressure ad-,

mitted to the outer ends of the main and auxiliary pressure inlet nozzles 5, 1, for injection into the fitting 3. Under the velocity of the steam, or water, issuing from nozzles 5 and I a vacuum is created in the fitting 3 and suction pipe I causing a siphoning action in pipes I, 2 and fitting 3 whereby the material is lifted by way of suction pipe I into fitting 3 and ejected out of pipe 2. The discharge end of the chamber 8 being close to the walls of the fitting 3, which is to say close to the walls of the body of the pump, the air in said body is displaced quicker and causes a greater vacuum therein than in present-day pumps of similar size. The chamber 8 provides for a large volume of steam, or water, being always present for discharge and giving full pressure at the discharge end of nozzle 5.

The steam, or water, issues from nozzle I in jet form and provides a constant pressure in fitting 3 and discharge pipe 2 forcing the material out of the latter. The uniform size of pipes I and 2 obviates congestion in the pump and consequent clogging.

The foregoing will, it is believed, suffice to impart a clear understanding of my invention without further explanation.

Manifestly the invention, as described, is susceptible of modification without departing from the inventive concept and right is herein reserved to such modification as fall within the scope of the subjoined claims.

What I claim is:

1. In a siphon pump, a pair of suction and discharge pipe sections, respectively, an elbowlike fitting connecting said sections together in right-angled relation, a tubular main pressure discharge section threaded at one end into the wall of said fitting in axial alignment with said discharge section and for connection at its opposite end to a pressure line, and an auxiliary tubular pressure discharge section of smaller diameter mounted in said main discharge section concentrically thereof, the inner ends of said pressure discharge sections being flush, and said ends of the pressure discharge sections and the inner end of the discharge pipe section terminating at opposite sides of the fitting, respectively, to clear the latter whereby said fitting provides a combined dislacement and siphoning chamber therein.

2. In a siphon pump, a pair of suction and discharge pipe sections, respectively, an elbow-like fitting connecting said sections together in rightangled relation, a tubular main pressure discharge section threaded at one end into the Wall of said fitting in axial alignment with said discharge section and for connection at its opposite end to a pressure line, and an auxiliary tubular pressure discharge section of smaller diameter mounted in said main discharge section concentrically thereof, said auxiliary discharge section having an inner, end reduced internally in diameter and providing a small discharge port in said end, the inner ends of said pressure discharge sections being fiush, and said ends of the pressure discharge sections and the inner end of 3 the discharge pipe section terminating at opposite sides of the fitting, respectively, to clear the latter whereby said fitting provides a combined displacement and siphoning chamber therein.

HUGH C. ALLSTON'. 

